#! /usr/bin/racket -f

#lang racket

(define   (is-between-3-7 n)
 (and (> n 3) (< n 7)) 
 )

(define (is-inside small big n)
  (and (> n small) (< n big))
  )

(display (is-between-3-7 9))
(display (is-inside 6 12 8))

